This add-on gives your users the option to change their username. The administrator has multiple options to control what usergroups can change their username and how.

Features:

Allow your users to change their username

Allows the administrator to set a cooldown period after changing a username until the user can change their username again

You can set this to no cooldown

Allows the username to set a maximum amount of times a usergroup can change their username

You can set this to unlimited

Allows the administrator to make it so moderators get an alert when a username is changed

You can decide whether normal moderators get an alert or only super moderators

Username history is shown on profiles

All user aspects of the add-on can be controlled through the XenForo permissions system

All aspects of phrases and templates can be controlled through the XenForo templates and phrases system

Store log of changes in the admin CP

Remove username change logs at the click of a button (or two, there's a confirmation)

0 overhead queries on any page load

Introduction
Have you wanted your users to be able to change their usernames? What about limit them to a certain amount of times? What about add a 2 week interval between username changes in which the user can't change his username? Are you looking for something like this?

Well, you've stumbled across the right add-on

Installation
A copy of these instructions, and more information, can be found in README.txt after downloading. Configuration options are also explained in README.txt

1. Unzip UsernameChange-{version}.zip
2. Upload the contents of the upload directory to your XenForo installation
3. Install the add-on by the following method
Admin CP -> Add-ons -> Install Add-on ->
Install from uploaded file:
Upload addon-apUsernameChange.xml
4. The add-on should now install, and a short rebuilding process should occur. Once done, the installation has been successful!

Database
1 new table:

apuc_username_change

Callback
This add-on makes a callback to Apantic's servers. This is an API callback. No information about your server other than the board URL is passed.

Purchasing
This add-on can be purchased by the automatic system on nanocode's Products website.
Payments can be made via PayPal, Bitcoin, UK Bank Transfer or International Bank Transfer (you may want to enquire about fees, more times than not the fees will be 3-4x the price of this add-on).